Sewing machine spooler drive release means



Feb. 20, 1940. F. E. ANbEnsoN 2,190,760

SEWING MACHINE SPOOLE'R DRIVE RELEASE MEANS Filed May 15, 1939 automatically ceases.

' Patented Feb. 20, h

Floyd E. Anderson, Belvidere, Ill., assignor to National Sewing. Machine Company, Belvidere, 111.,

r a corporation of Illinois 1 *j, application May 15,1939 Serial No. 273,595

- -2Claiins. (o1.24z--22) This invention ,relates to sewing machines and particularly to means for automatically releasing the spooler drive.

The object of the invention is to provide a L one piece rigid angular arm adapted to be connected rigidly to the upright. standard of a sewing machine, in position to bear automatically .on the thread wound ona spool when a predetermined quantity of thread has been spooled.

.After contact has been "made between therigid arm and the spooled thread, continued windin of a limited quantity of the thread causes the spooler pulley gradually to move out of engagement with the fiy wheel, whereupon the winding This construction is exceedingly simple and durable. The spooler drive release means heretofore known have required the use. of several parts, usually spring or cam controlled. My in- 2 vention is not only economical but is absolutely dependable and free of parts which .collect threads and lint and cause other spooler drive rel-ease means to get out of order.

In the drawing: 25 Fig. 1 is an. end elevation of amotor driven sewing machine head embodying my invention, showing the. spooler pulley in driving contact with the fly wheel.

Fig. .2 is an elevational view of part oi the construction shown. inFig. 1, the spooler pulley having been moved automaticallyout of driving contact with the fly wheel.

Fig. 3 is a horizontal sectional view, taken in the plane of theline 3-3 of Fig. 2. H a In that embodiment of my invention shown in the drawing, the invention is embodied in a motordriven machine, but obviously it is ap plicable to manually operated sewing machines.

On the bed plate ID of the sewing head is an upright standard onwhich is mounted a. l

shaft pulley M. A spooler lever I5 is pivotally mounted at IE? on the standard ||.v The pivotal connection l6 consists of the sleeve-like lower portion of the lever l5 marked IS in Fig. .3 which is frictionally mounted on the headed .stud marked IS in Figs. land 2. The lever J5 is curved, as shown in Fig. 3, to position its upper sleeve end I! in proper relation to the fly wheel mounted in the sleeve IT. The pin I9 projects at 20 from the sleeve on the side opposite the pulley l8, and is adapted to hold frictionally the spool 2| on which thread is to be wound. The

55 spool 2| rotates with the pin when the pulley |8 "tance from the axis of the spool.

is equal to the thickness of the volume of thread A pulley i8 is fixed to a. ping l9 rotatably is in contact with the fly wheel l3. 1 Thread is fed to the spool 2| from a spool 22 on a holder 23, through a tension device 24.

The spooler drive releasing means of my invention consists of a one piece rigid angular arm 5 1 indicated as a whole at 25. It comprises an apertured ear 26, substantially vertically disposed,

a bar 2'! which is horizontally disposed adjacent the ear 26, but slightly twisted between its ends so that the portion 28 has its flat sides inclined 10, downwardly, as shown. The outer portion of the bar 2|--28 merges with a vertical, upwardly projecting member 29 and the latter mergeswith an upwardly inclined contact member 30..

The arm 25 is rigidly fastened to the standard II by a screw 3| extending through the car 26.

The arm is proportioned so that the contact member 30 extends upwardly over the spool 2|,;

between the spool flanges, a predetermined dis- I The distance.

intendedto be wound on the spool. When less than the predetermined quantityof thread is on the spool, the spooler arm I5 and pulley l8 may be moved manually to the position shown in Fig.

1, with the fly wheel l3 and pulley IBin driving engagement, and the contact member 3!] is partly withinthe peripheral edgesof the flanges of the spool 2|. The lever I5 is frictionally mounted at l6 so :that it remains in this position until. forced away from the contact member 3|] as will be explained. After a certain quantity of thread has been wound on the spool 2|, its outer turns come-into contact with the contact member 30 of the rigid arm 25, and continued winding of a limited quantity of thread causes the spool 2| and consequently the lever l5 and pulley l8 to move gradually downwardly about the pivotal connection IE, to a slight extent, but sufficient to release the driving engagement between the fly wheel I3. and pulley l8, as shown in Fig. 2, where'the contact member 30 is outwardly of the peripheral edges of the-flanges of the spool 1 and still provide the fixed contact member 30' which cooperates "with the thread containing spool to effect thespooler drive release. I X

I claim:

the axis of the fly Wheel mounted on the standard below the-flywheel, a spooler arm on said pivot, a pin rotatably mounted in the spooler arm, a pulley fixed on the pin, a spool frictionally mounted on the pin, the spooler arm and all the parts mounted thereon being located between vertical planes tangent with the periphery of the-1;: fly wheel, and said spooler arm. being manually movable to place the pulley into engagement'with the fly wheel, and spooler drive releasing means comprising a rigid arm fixedlyf-mounted on" the standard between the fly 'wheel'and spooler arm 1 M armed vertically disposed ear bearing on the up- ..right standard, ahorizontally disposed bar extending outwardly from the standard, and an uppivot, said arm having a contact member which contacts the thread on the spool when a prede termined quantity has been wound on the spool.

2 A sewingmachine comprising a sewing head having an upright standard, a fly wheel rotatably mounted on the standard, a pivot parallel with the axis of the fly wheel mounted on the standard below the fly wheeLa spooler arm on said pivot, a pin rotatably mounted in the spooler arm, a pulley fixed on the pin, a spool frictionally mounted on the pin, the spooler arm and all the parts mounted thereon being located between vertical planes tangent withthe periphery of the fly wheel, and; said spoolergarm beingmanually movable to place the pulley into engagement with "the fly wheel, and spooler drive releasing means comprising a rigid arm fixedly mounted onthe standard between the fly wheel and 'spooler arm termined quantitylhas been wound on the spool,

said relea'se arm consisting of an integrally wardly inclined contact member extending laterallyfrom said bar toward the spool.

" g ANDERSON. 

